Rich Peverley is resting comfortably at a Dallas hospital and undergoing tests after Monday night's scare, Stars GM Jim Nill said in a released statement on Tuesday.

Peverley, who has an irregular heartbeat, collapsed on the bench after a cardiac event and needed one defibrillation to restore his heart rhythm and regain consciousness. The Stars' game against Columbus was understandably canceled.

The focus of all the testing and monitoring is being dedicated to finding the cause of the event and a long-term solution to rectify the problem.

We do not have any more specifics at the moment.

Rich has been communicating with his teammates and friends. He is extremely grateful for all of the prayers and support that he’s received from fans and friends alike.

The next logical question: What is a cardiac event? It's not a heart attack, or, myocardial infarction, which is when one or more coronary arteries is blocked and can't provide oxygen-rich blood to the heart.

(Sudden) cardiac arrest occurs when the electrical system to the heart malfunctions and suddenly becomes very irregular. The heart beats dangerously fast. The ventricles may flutter or quiver (ventricular fibrillation), and blood is not delivered to the body. In the first few minutes, the greatest concern is that blood flow to the brain will be reduced so drastically that a person will lose consciousness. Death follows unless emergency treatment is begun immediately.

Emergency treatment includes cardiopulmonary resuscitation (CPR) and defibrillation. CPR keeps enough oxygen in the lungs and gets it to the brain until the normal heart rhythm is restored with an electric shock to the chest (defibrillation). Portable defibrillators used by emergency personnel, or public access defibrillators (AEDs) may help save the person’s life.

The Stars' medical team used both a defibrillator and CPR in their response to Peverley's collapse. It was amazingly fast and, not coincidentally, successful, as Greg Wyshynski wrote .